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Tag undefined - This is page 203 - GeneraCodice
Why is null an object and what's the difference between null and undefined?
https://www.generacodice.com/en/articolo/43243/why-is-null-an-object-and-what-s-the-difference-between-null-and-undefined
JavaScript
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null
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object
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undefined
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typeof
StackOverflow
Detecting an undefined object property
https://www.generacodice.com/en/articolo/26631/detecting-an-undefined-object-property
JavaScript
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object
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undefined
StackOverflow
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